Connect LetSign to Hermes Agent by Nous Research over the Model Context Protocol, and your agent drafts the proposal, the pricing options and the contract on request - then stages it for your review. Your client opens one link, picks a plan, signs a binding e-signature and pays into your own Stripe. LetSign is the layer that actually closes the deal Hermes starts.
Hermes does the reasoning, LetSign does the contracting, Stripe does the collecting. LetSign is an MCP tool server, so Hermes connects to it the same way it connects to GitHub or a database. You stay in the loop exactly once - at send time.
No SDK, no webhooks, no integration project. MCP support ships with the standard Hermes install - the whole setup is one MCP server, one Stripe connection and one instruction.
Hermes Agent by Nous Research supports the Model Context Protocol (MCP) and connects to external MCP tool servers - GitHub, databases, file systems, internal APIs, SaaS apps and more. MCP support is included with the standard Hermes install, so you point Hermes at the LetSign MCP endpoint (you get it from app.letsign.ai). Note that Nous curates the catalog: each MCP server manifest is reviewed by pull request into the hermes-agent repo before it ships. See the LetSign MCP docs for the endpoint and tool list.
In the LetSign app, connect your own Stripe account once. From then on every payment - one-off, subscription, or save-card-on-file - is collected through your Stripe and lands in your account. LetSign never holds your money.
Hermes is the agent that grows with you, so you ask in plain language and it drafts the proposal through the LetSign MCP. One proven prompt:
"Draft a LetSign proposal for Meridian Studios - three tiers, the middle one at $6,000/mo - and stage it for my review."
The agent stages the proposal; nothing sends itself. You read it in LetSign, tweak anything you like (a discount, net-60 terms, a different tier), and press send. The human send-gate is a feature, not a limitation.
Your client opens one public link, chooses between the plans you offered (conditional pricing built in), verifies their email, signs a binding e-signature and pays through your Stripe - in a single sitting. Remember: the sender never signs. The client does.
Because LetSign is a plain MCP tool server, the same stack runs on any MCP-capable agent - see the Claude, Codex and Cursor playbooks. For the full landscape, read the AI sales automation tools map.
Your Hermes agent drafts the whole proposal with up to several plans your client can choose from - three tiers, optional add-ons, the works - straight from what you tell it.
"Has Meridian signed yet?" Hermes reads proposal state through the LetSign MCP: opened, plan picked, signed, paid - without you opening a dashboard.
Client asks for net-60 or a 10% discount? One more prompt to Hermes updates the terms and restages the proposal for your review.
One-off invoices, subscriptions, or save-card-on-file - collected through your own Stripe account at signature time, not weeks later.
And everything Hermes does here, you can also do by hand. Every proposal, template and setting is fully editable in the LetSign app - full parity with the MCP. That two-way door is the essence of an agent-native contract: your agent and you work on the same object, and neither is a second-class citizen. See how it works end to end.
Yes. Hermes Agent by Nous Research supports the Model Context Protocol (MCP) and connects to external MCP tool servers - GitHub, databases, file systems, browser stacks, internal APIs, SaaS apps and more. MCP support is included with the standard Hermes install, and each MCP server manifest is reviewed by pull request into the hermes-agent repo before it ships, so the tool catalog is curated by Nous. LetSign is one such MCP tool server, so Hermes connects to it over MCP.
No. MCP support ships with the standard Hermes install, so connecting the LetSign MCP server is configuration, not development. You connect Stripe once inside LetSign, then ask your Hermes agent in plain language to draft the proposal. And if you ever prefer to work by hand, every proposal and template is fully editable in the LetSign app.
The Free plan is $0 with a 0.20% fee on payments collected through it. The launch plan is $19 per month until October 1, 2026, and that price is locked until October 1, 2028; after launch the standard price is $49 per month. Paid plans pay 0% on payments up to $20,000 per month, then 0.05% above that.
You do. The Hermes agent drafts and stages the proposal, but nothing sends itself: a human reviews and presses send. And the sender never signs. Your client opens the link, picks a plan, verifies their email, signs a binding e-signature and pays through your Stripe.
Connect the MCP server, connect Stripe, and let Hermes stage the next proposal for your review.
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